InChI=1S/C21H20O12/c22-8-3-1-7(2-4-8)9-6-31-11-5-10(23)14(25)18(12(11)13(9)24)32-21-17(28)15(26)16(27)19(33-21)20(29)30/h1-5,9,15-17,19,21-23,25-28H,6H2,(H,29,30)